8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <linux/byteorder/swab.h>
31 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
33 /* Board support for 1 or 2 flash devices */
34 #define FLASH_PORT_WIDTH32
35 #undef FLASH_PORT_WIDTH16
37 #ifdef FLASH_PORT_WIDTH16
38 #define FLASH_PORT_WIDTH ushort
39 #define FLASH_PORT_WIDTHV vu_short
40 #define SWAP(x) __swab16(x)
42 #define FLASH_PORT_WIDTH ulong
43 #define FLASH_PORT_WIDTHV vu_long
44 #define SWAP(x) __swab32(x)
47 #define FPW FLASH_PORT_WIDTH
48 #define FPWV FLASH_PORT_WIDTHV
50 #define mb() __asm__ __volatile__ ("" : : : "memory")
52 /*-----------------------------------------------------------------------
55 static ulong flash_get_size (FPW *addr, flash_info_t *info);
56 static int write_data (flash_info_t *info, ulong dest, FPW data);
57 static void flash_get_offsets (ulong base, flash_info_t *info);
58 void inline spin_wheel (void);
60 /*-----------------------------------------------------------------------
63 unsigned long flash_init (void)
69 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
72 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
73 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
76 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
77 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
80 panic ("configured too many flash banks!\n");
83 size += flash_info[i].size;
86 /* Protect monitor and environment sectors
88 flash_protect ( FLAG_PROTECT_SET,
89 CONFIG_SYS_FLASH_BASE,
90 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
93 flash_protect ( FLAG_PROTECT_SET,
95 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
102 /*-----------------------------------------------------------------------
104 static void flash_get_offsets (ulong base, flash_info_t *info)
108 if (info->flash_id == FLASH_UNKNOWN) {
112 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
113 for (i = 0; i < info->sector_count; i++) {
114 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
115 info->protect[i] = 0;
120 /*-----------------------------------------------------------------------
122 void flash_print_info (flash_info_t *info)
126 if (info->flash_id == FLASH_UNKNOWN) {
127 printf ("missing or unknown FLASH type\n");
131 switch (info->flash_id & FLASH_VENDMASK) {
132 case FLASH_MAN_INTEL:
136 printf ("Unknown Vendor ");
140 switch (info->flash_id & FLASH_TYPEMASK) {
141 case FLASH_28F128J3A:
142 printf ("28F128J3A\n");
145 printf ("Unknown Chip Type\n");
149 printf (" Size: %ld MB in %d Sectors\n",
150 info->size >> 20, info->sector_count);
152 printf (" Sector Start Addresses:");
153 for (i = 0; i < info->sector_count; ++i) {
158 info->protect[i] ? " (RO)" : " ");
165 * The following code cannot be run from FLASH!
167 static ulong flash_get_size (FPW *addr, flash_info_t *info)
171 /* Write auto select command: read Manufacturer ID */
172 addr[0x5555] = (FPW) 0x00AA00AA;
173 addr[0x2AAA] = (FPW) 0x00550055;
174 addr[0x5555] = (FPW) 0x00900090;
181 case (FPW) INTEL_MANUFACT:
182 info->flash_id = FLASH_MAN_INTEL;
186 info->flash_id = FLASH_UNKNOWN;
187 info->sector_count = 0;
189 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
190 return (0); /* no or unknown flash */
194 value = addr[1]; /* device ID */
198 case (FPW) INTEL_ID_28F128J3A:
199 info->flash_id += FLASH_28F128J3A;
200 info->sector_count = 128;
201 info->size = 0x02000000;
202 break; /* => 16 MB */
205 info->flash_id = FLASH_UNKNOWN;
209 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
210 printf ("** ERROR: sector count %d > max (%d) **\n",
211 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
212 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
215 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
221 /*-----------------------------------------------------------------------
224 int flash_erase (flash_info_t *info, int s_first, int s_last)
226 int flag, prot, sect;
227 ulong type, start, last;
230 if ((s_first < 0) || (s_first > s_last)) {
231 if (info->flash_id == FLASH_UNKNOWN) {
232 printf ("- missing\n");
234 printf ("- no sectors to erase\n");
239 type = (info->flash_id & FLASH_VENDMASK);
240 if ((type != FLASH_MAN_INTEL)) {
241 printf ("Can't erase unknown flash type %08lx - aborted\n",
247 for (sect = s_first; sect <= s_last; ++sect) {
248 if (info->protect[sect]) {
254 printf ("- Warning: %d protected sectors will not be erased!\n",
260 start = get_timer (0);
263 /* Disable interrupts which might cause a timeout here */
264 flag = disable_interrupts ();
266 /* Start erase on unprotected sectors */
267 for (sect = s_first; sect <= s_last; sect++) {
268 if (info->protect[sect] == 0) { /* not protected */
269 FPWV *addr = (FPWV *) (info->start[sect]);
272 printf ("Erasing sector %2d ... ", sect);
274 /* arm simple, non interrupt dependent timer */
275 reset_timer_masked ();
277 *addr = (FPW) 0x00500050; /* clear status register */
278 *addr = (FPW) 0x00200020; /* erase setup */
279 *addr = (FPW) 0x00D000D0; /* erase confirm */
281 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
282 if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
283 printf ("Timeout\n");
284 *addr = (FPW) 0x00B000B0; /* suspend erase */
285 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
291 *addr = 0x00500050; /* clear status register cmd. */
292 *addr = 0x00FF00FF; /* resest to read mode */
300 /*-----------------------------------------------------------------------
301 * Copy memory to flash, returns:
304 * 2 - Flash not erased
305 * 4 - Flash not identified
308 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
312 int count, i, l, rc, port_width;
314 if (info->flash_id == FLASH_UNKNOWN) {
317 /* get lower word aligned address */
318 #ifdef FLASH_PORT_WIDTH16
327 * handle unaligned start bytes
329 if ((l = addr - wp) != 0) {
331 for (i = 0, cp = wp; i < l; ++i, ++cp) {
332 data = (data << 8) | (*(uchar *) cp);
334 for (; i < port_width && cnt > 0; ++i) {
335 data = (data << 8) | *src++;
339 for (; cnt == 0 && i < port_width; ++i, ++cp) {
340 data = (data << 8) | (*(uchar *) cp);
343 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
350 * handle word aligned part
353 while (cnt >= port_width) {
355 for (i = 0; i < port_width; ++i) {
356 data = (data << 8) | *src++;
358 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
363 if (count++ > 0x800) {
374 * handle unaligned tail bytes
377 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
378 data = (data << 8) | *src++;
381 for (; i < port_width; ++i, ++cp) {
382 data = (data << 8) | (*(uchar *) cp);
385 return (write_data (info, wp, SWAP (data)));
388 /*-----------------------------------------------------------------------
389 * Write a word or halfword to Flash, returns:
392 * 2 - Flash not erased
394 static int write_data (flash_info_t *info, ulong dest, FPW data)
396 FPWV *addr = (FPWV *) dest;
400 /* Check if Flash is (sufficiently) erased */
401 if ((*addr & data) != data) {
402 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
405 /* Disable interrupts which might cause a timeout here */
406 flag = disable_interrupts ();
408 *addr = (FPW) 0x00400040; /* write setup */
411 /* arm simple, non interrupt dependent timer */
412 reset_timer_masked ();
414 /* wait while polling the status register */
415 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
416 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
417 *addr = (FPW) 0x00FF00FF; /* restore read mode */
422 *addr = (FPW) 0x00FF00FF; /* restore read mode */
427 void inline spin_wheel (void)
430 static char w[] = "\\/-";
432 printf ("\010%c", w[p]);
433 (++p == 3) ? (p = 0) : 0;